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arXiv · 1906.06112

Robust estimators for turbulence properties assessment

Daniel Valero·Hubert Chanson·Daniel B. Bung
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Abstract

Robust estimators and different filtering techniques are proposed and their impact on the determination of a wide range of turbulence quantities is analysed. High-frequency water level measurements in a stepped spillway are used as a case study. The studied variables contemplated: the expected free surface level, the expected fluctuation intensity, the depth skewness, the autocorrelation timescales, the vertical velocity fluctuation intensity, the perturbations celerity and the one-dimensional free surface turbulence spectrum. When compared to classic techniques, the robust estimators allowed a more accurate prediction of turbulence quantities notwithstanding the filtering technique used.

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BibTeXRIS

Daniel Valero, Hubert Chanson, Daniel B. Bung. 2019-06-14. Robust estimators for turbulence properties assessment. https://doi.org/10.1016/j.flowmeasinst.2020.101809

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